--- a/media/webrtc/signaling/src/peerconnection/PeerConnectionImpl.cpp
+++ b/media/webrtc/signaling/src/peerconnection/PeerConnectionImpl.cpp
@@ -1979,16 +1979,21 @@ PeerConnectionImpl::RemoveOldRemoteTrack
 
   std::vector<RefPtr<JsepTrack>> removedTracks =
     mJsepSession->GetRemoteTracksRemoved();
 
   for (auto& removedTrack : removedTracks) {
     const std::string& streamId = removedTrack->GetStreamId();
     const std::string& trackId = removedTrack->GetTrackId();
 
+    if (removedTrack->GetMediaType() == SdpMediaSection::kApplication) {
+      // TODO do we need to notify content somehow here?
+      continue;
+    }
+
     RefPtr<RemoteSourceStreamInfo> info = mMedia->GetRemoteStreamById(streamId);
     if (!info) {
       MOZ_ASSERT(false, "A stream/track was removed that wasn't in PCMedia. "
                         "This is a bug.");
       continue;
     }
 
     mMedia->RemoveRemoteTrack(streamId, trackId);